{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "Although there have been anecdotal reports of cardiac toxicity associated with fluorouracil ( 5 - FU ) therapy , this phenomenon has not been studied in a systematic fashion ."}
{"Chemical": ["fluorouracil", "5 - FU"], "Disease": ["cardiac toxicity"]}